Center buffer appliance for railway-trucks.



4 Y J. MOBNTYRE- CENTER BUFFER APPLIANCE FOR RAILWAY TRUCKS.

APPLICATION FILED MAY 2, 1913.

Patented Dec. 29, 1914.

W. Q y% W HE NORRIS PE rERs 00.. PHOTO-LITHIL WASHINGTON. D. r

UNITED STATES PATENT OFFICE.

JOHN MCENTYRE, OF BOOTY HILL, NEW SOUTH WALES, AUSTRALIA.

CENTER BUFFER APPLIANCE FOR RAILWAY-TRUCKS.

To all whom it may concern:

Be it known that I, JOHN MOENTYRE,

subject of the King of Great Britain and Ireland, residing at Forest Grange, Booty Hill, in the State of New South Wales, Commonwealth of Australia, have invented new and useful improvements in Center Buffer Appliances for Railway- Trucks, of which the following is a specification.

My invention consists of a split buffer, one half of which is located on each side of the draw-hook at the center of the end of the truck, the two halves of the split buffer being loosely connected, behind, to a cross head that is adapted to slide in or on guides whenever the split buffer heads are forced back by impact with other split buffer heads of a similar kind on another truck. The cross head is provided centrally with a plunger, which bears against a powerful bufi'er spring behind, or other suitable analogous kind of spring, whereby the force of impact with another buffer will be resiliently met. The plunger is constructed hollow so that the draw-hook rod may pass axially through it (and the buffer spring) to a powerful spring located at or near the center of the under frame of the truck. The buffer spring will, preferably, bear against a butterfly plate which will he stayed, in any suit able manner, to the end beam or the side members of the under frame of the truck.

In the accompanying drawings: Figure 1 is a plan of the central buffer appliances in their normal positions. Fig. 2 is a similar plan of the appliances, but the split buffer of the truck has been bumped on a curve by a similar bufi'er on another truck, the latter being shown by dotted lines. Fig. 8 is a plan, on an enlarged scale of the sliding cross-head to which the two halves of the split bufl'er head are loosely secured.

A is the end beam of the under frame of a railway truck, B, B are the side members of the same, C, C are the two halves of the split buffer, the rear ends of which are loosely secured, by split pins or cotters, to the cross-head D, the ends of which are recessed at (Z so as to be adapted to slide back ward and forward on the guide rods E, E. Secured to the guide rods E, E, is a transverse guide plate F adapted to guide the plunger G when it is forced toward the rear.

Specification of Letters Patent.

Patented Dec. 29, 1914..

Application filed May 2, 1913. Serial No. 764,990.

The forward end of the plunger G will bear against the cross-head D at or near its center while the rear end of the plunger will bear against a powerful, centrally situated, buffer spring H. The buffer spring H, in its turn, will bear against a disk or butterfly plate it, which will be permanently secured, in a suitable position, by stays J, J that are strongly bolted to the side members B, B of the under frame, or to the end beam A thereof. A draw-hook K will be placed centrally between the split buffer heads (I, C, the draw-hook being integral with a draw bar 70, the inner end of which will be attached to a powerful spring (not shown in the drawings) situated at or near the center of the underframe of the truck.

In Fig. 2, rails L, L are shown in order to indicate a curve and show the efiect upon the bufier appliances when two trucks bump upon such a curve. Thus, in this figure the cross-head D is shown out of parallel with the end beam A or with the guide plate F. The spring H is shown at its maximum compression and the buffer head C is forced rearward to a greater extent than the buffer head C. In order to prevent jamming of the parts when a bump takes place on a curve, the apertures or orifices in the crosshead D are made elliptical. The plunger H is made with a rounded head to allow for play, and hollow so that the drawbar 70 can pass axially through it, and the buffer spring H, to the central spring.

Iclaim:

In buffers for railway trucks, a cross-head behind the end beam of the under frame of the truck, split bufier heads loosely connected thereto and projecting forward, a

loose plunger located centrally behind the cross-head, a transverse guide plate for the plunger, a powerful buffer spring behind the plunger, a butterfly plate behind the spring, and stays between the butterfly plate and the side members of the under frame, all as and for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN MoENTYRE.

Witnesses:

A. MAssEY, H. C. CAMPBELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

